Successful treatment of disseminated nocardiosis diagnosed by metagenomic next-generation sequencing: A case report and review of literature

Figure 3 Chronic inflammation with acute activity and fibrous hyperplasia, with focal necrosis in the right upper lobe. A: A large number of chronic inflammatory cells with a small amount of neutrophil infiltration in hyperplastic fibrous connective tissue (Original magnification: 100 ×; scale bar: 100 μm); B: There are collagen hyperplasia and no obvious alveolar epithelial cells in some areas (Original magnification: 200 ×; scale bar: 100 μm); C and D: In addition, there are phagocytic cells that engulf carbonic acid in some areas, inflammatory cell infiltration and capillary endothelial cells in the interstitium (C: 200 ×; scale bar: 100 μm; D: 400 ×; scale bar: 100 μm).